Olive Oil Test shoot

Love the concept Eric!
You've got the main areas covered I think & as you asked here are the ares that I would concentrate on... My eye is initially drawn to the fact that the central bright gradient behind the bottle isn't central with the bottle - the bottle's the star of the image so the grad should be directly behind it!
I think that there needs to be some sort of shadows or reflections to ground the bottle and olives... I get that they could be floating with the clouds but the look a little odd with only the small shadow on the left of the bottle.
Personally, I'd try and get more of a gradient across the right side of the bottle and some sort of highlight or rim light on the left side as it's a little flat.
Don't get me wrong, this is a great image and with a couple of little tweaks (in my humble opinion!) it will really sing!
Keep up the great work!

Ian pretty much nailed it, I would just say to lighten the left side in shadow, maybe less contrast with the front, but that's just personal preference. The leaves behind the bottle also seem a little dead, lack a bit of contrast, specially when you compare with the ones on the other side.
The shifted gradient and lack of ground plane shadow are most critical, but easily corrected, for sure.
You did do a interesting image, good concept. If you decide to do any changes, let us see it. Nice work.